/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package pack_servlets;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import pack_gestionarCarrito.Carrito;
import pack_gestionarCarrito.Compra;
import pack_gestionarProducto.ActualizarBD;

/**
 *
 * @author Fernando
 */
@WebServlet(name = "EliminarProductoCarro", urlPatterns = {"/EliminarProductoCarro"})
public class EliminarProductoCarro extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try {
            ActualizarBD update = new ActualizarBD();
            HttpSession AplicationSession = request.getSession(true);
            Carrito carro;
            System.out.println("PREPARANDO SERVLET ELIMINARPRODUCTOCARRO " + AplicationSession.getAttribute("carro"));
            if (AplicationSession.getAttribute("carro") != null) {
                int id_producto = Integer.parseInt(request.getParameter("idproducto"));
                carro = (Carrito) AplicationSession.getAttribute("carro");
                // Recorre la lista del carro buscando el producto que se irá a eliminar del carrito.
                for (int i = 0; i < carro.getLista().size(); i++) {
                    Compra compra = carro.getLista().get(i);
                    if (compra.getId_producto() == id_producto) {//true si es el producto a eliminar.
                        //devuelve la cantidad total a la BD.
                        int sum = update.consultCantidadProductoBD(compra.getId_producto()) + compra.getCantidad();
                        update.actualizar(sum, compra.getId_producto());//Actualiza la BD con la cantidad correcta.
                        //Elimina el producto del carrito.
                        carro.eliminarProductoCarrito(i);
                        System.out.println("PRODUCTO DEL CARRITO ELIMINADO");
                        break;
                    }
                }
                AplicationSession.setAttribute("carro", carro);
                AplicationSession.setAttribute("TotalCompra", carro.getTotal_compra());
                AplicationSession.setAttribute("contadorProducto", carro.contarArticulos());
            }
        } finally {
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
